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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <arch/asm.h>
  30. #include <context.h>
  31. #include <print.h>
  32. #include <panic.h>
  33. #include <debug.h>
  34. #include <config.h>
  35. #include <time/clock.h>
  36. #include <proc/scheduler.h>
  37. #include <proc/thread.h>
  38. #include <proc/task.h>
  39. #include <main/kinit.h>
  40. #include <console/kconsole.h>
  41. #include <cpu.h>
  42. #include <align.h>
  43. #include <interrupt.h>
  44. #include <main/version.h>
  45.  
  46. #ifdef CONFIG_SMP
  47. #include <arch/smp/apic.h>
  48. #include <arch/smp/mps.h>
  49. #endif /* CONFIG_SMP */
  50.  
  51. #include <smp/smp.h>
  52.  
  53. #include <arch/mm/memory_init.h>
  54. #include <mm/heap.h>
  55. #include <mm/frame.h>
  56. #include <mm/page.h>
  57. #include <mm/tlb.h>
  58. #include <mm/vm.h>
  59.  
  60. #include <synch/waitq.h>
  61.  
  62. #include <arch/arch.h>
  63. #include <arch.h>
  64. #include <arch/faddr.h>
  65.  
  66. #include <typedefs.h>
  67.  
  68. config_t config;
  69. context_t ctx;
  70.  
  71. /**
  72.  * These 'hardcoded' variables will be intialized by
  73.  * the linker or the low level assembler code with
  74.  * appropriate sizes and addresses.
  75.  */
  76. __address hardcoded_load_address = 0;
  77. size_t hardcoded_ktext_size = 0;
  78. size_t hardcoded_kdata_size = 0;
  79.  
  80. __address init_addr = 0;
  81. size_t init_size = 0;
  82.  
  83. void main_bsp(void);
  84. void main_ap(void);
  85.  
  86. /*
  87.  * These two functions prevent stack from underflowing during the
  88.  * kernel boot phase when SP is set to the very top of the reserved
  89.  * space. The stack could get corrupted by a fooled compiler-generated
  90.  * pop sequence otherwise.
  91.  */
  92. static void main_bsp_separated_stack(void);
  93. #ifdef CONFIG_SMP
  94. static void main_ap_separated_stack(void);
  95. #endif
  96.  
  97. /** Bootstrap CPU main kernel routine
  98.  *
  99.  * Initializes the kernel by bootstrap CPU.
  100.  *
  101.  * Assuming interrupts_disable().
  102.  *
  103.  */
  104. void main_bsp(void)
  105. {
  106.     config.cpu_count = 1;
  107.     config.cpu_active = 1;
  108.    
  109.     config.base = hardcoded_load_address;
  110.     config.memory_size = get_memory_size();
  111.     config.init_addr = init_addr;
  112.     config.init_size = init_size;
  113.    
  114.     if (init_size > 0)
  115.         config.heap_addr = init_addr + init_size;
  116.     else
  117.         config.heap_addr = hardcoded_load_address + hardcoded_ktext_size + hardcoded_kdata_size;
  118.    
  119.     config.heap_size = CONFIG_HEAP_SIZE + (config.memory_size / FRAME_SIZE) * sizeof(frame_t);
  120.    
  121.     config.kernel_size = ALIGN_UP(config.heap_addr - hardcoded_load_address + config.heap_size, PAGE_SIZE);
  122.     config.heap_delta = config.kernel_size - (config.heap_addr - hardcoded_load_address + config.heap_size);
  123.     config.kernel_size = config.kernel_size + CONFIG_STACK_SIZE;
  124.    
  125.     context_save(&ctx);
  126.     context_set(&ctx, FADDR(main_bsp_separated_stack), config.base + config.kernel_size, CONFIG_STACK_SIZE);
  127.     context_restore(&ctx);
  128.     /* not reached */
  129. }
  130.  
  131.  
  132. /** Bootstrap CPU main kernel routine stack wrapper
  133.  *
  134.  * Second part of main_bsp().
  135.  *
  136.  */
  137. void main_bsp_separated_stack(void)
  138. {
  139.     vm_t *m;
  140.     task_t *k;
  141.     thread_t *t;
  142.    
  143.     the_initialize(THE);
  144.    
  145.     /*
  146.      * kconsole data structures must be initialized very early
  147.      * because other subsystems will register their respective
  148.      * commands.
  149.      */
  150.     kconsole_init();
  151.  
  152.     /* Exception handler initialization, before architecture
  153.      * starts adding its own handlers
  154.      */
  155.     exc_init();
  156.    
  157.     arch_pre_mm_init();
  158.     early_heap_init(config.heap_addr, config.heap_size + config.heap_delta);
  159.     frame_init();
  160.     page_init();
  161.     tlb_init();
  162.     arch_post_mm_init();
  163.  
  164.     version_print();
  165.  
  166.     printf("%P: hardcoded_ktext_size=%dK, hardcoded_kdata_size=%dK\n",
  167.         config.base, hardcoded_ktext_size/1024, hardcoded_kdata_size/1024);
  168.  
  169.     arch_pre_smp_init();
  170.     smp_init();
  171.     printf("config.memory_size=%dM\n", config.memory_size/(1024*1024));
  172.     printf("config.cpu_count=%d\n", config.cpu_count);
  173.  
  174.     cpu_init();
  175.  
  176.     calibrate_delay_loop();
  177.  
  178.     timeout_init();
  179.     scheduler_init();
  180.     task_init();
  181.     thread_init();
  182.    
  183.     if (config.init_size > 0)
  184.         printf("config.init_addr=%X, config.init_size=%d\n", config.init_addr, config.init_size);
  185.  
  186.     /*
  187.      * Create kernel vm mapping.
  188.      */
  189.     m = vm_create(GET_PTL0_ADDRESS());
  190.     if (!m)
  191.         panic("can't create kernel vm address space\n");
  192.  
  193.     /*
  194.      * Create kernel task.
  195.      */
  196.     k = task_create(m);
  197.     if (!k)
  198.         panic("can't create kernel task\n");
  199.        
  200.     /*
  201.      * Create the first thread.
  202.      */
  203.     t = thread_create(kinit, NULL, k, 0);
  204.     if (!t)
  205.         panic("can't create kinit thread\n");
  206.     thread_ready(t);
  207.     /*
  208.      * This call to scheduler() will return to kinit,
  209.      * starting the thread of kernel threads.
  210.      */
  211.     scheduler();
  212.     /* not reached */
  213. }
  214.  
  215.  
  216. #ifdef CONFIG_SMP
  217. /** Application CPUs main kernel routine
  218.  *
  219.  * Executed by application processors, temporary stack
  220.  * is at ctx.sp which was set during BP boot.
  221.  *
  222.  * Assuming interrupts_disable()'d.
  223.  *
  224.  */
  225. void main_ap(void)
  226. {
  227.     /*
  228.      * Incrementing the active CPU counter will guarantee that the
  229.      * pm_init() will not attempt to build GDT and IDT tables again.
  230.      * Neither frame_init() will do the complete thing. Neither cpu_init()
  231.      * will do.
  232.      */
  233.     config.cpu_active++;
  234.  
  235.     /*
  236.      * The THE structure is well defined because ctx.sp is used as stack.
  237.      */
  238.     the_initialize(THE);
  239.    
  240.     arch_pre_mm_init();
  241.     frame_init();
  242.     page_init();
  243.     tlb_init();
  244.     arch_post_mm_init();
  245.    
  246.     cpu_init();
  247.    
  248.     calibrate_delay_loop();
  249.  
  250.     l_apic_init();
  251.     l_apic_debug();
  252.  
  253.     the_copy(THE, (the_t *) CPU->stack);
  254.  
  255.     /*
  256.      * If we woke kmp up before we left the kernel stack, we could
  257.      * collide with another CPU coming up. To prevent this, we
  258.      * switch to this cpu's private stack prior to waking kmp up.
  259.      */
  260.     context_set(&CPU->saved_context, FADDR(main_ap_separated_stack), (__address) CPU->stack, CPU_STACK_SIZE);
  261.     context_restore(&CPU->saved_context);
  262.     /* not reached */
  263. }
  264.  
  265.  
  266. /** Application CPUs main kernel routine stack wrapper
  267.  *
  268.  * Second part of main_ap().
  269.  *
  270.  */
  271. void main_ap_separated_stack(void)
  272. {
  273.     /*
  274.      * Configure timeouts for this cpu.
  275.      */
  276.     timeout_init();
  277.  
  278.     waitq_wakeup(&ap_completion_wq, WAKEUP_FIRST);
  279.     scheduler();
  280.     /* not reached */
  281. }
  282. #endif /* CONFIG_SMP */
  283.